218 GTALECTA. 



narrowed and for the most part cylindraceous, not seldom 

 more than 8-sporous thekes, with thread-shaped paraph yses) 

 ellipsoid ; passing into fusiform ; and acicular ; 2-4-pluri- 

 locular; and more rarely inuriform-plurilocular ; not col- 

 oured. Thallus crustaceous j uniform. 



* Secoliga emend. Apothecia coloured. 

 f Spores 2-4-phirilocular. 



1. G. lutea (Dicks.) Tuckerm. ; thallus thin membranaceous ; 

 greenish-ash-coloured; apothecia small to almost, and, in the 

 tropics, more than middling-sized, sessile ; soon explanate and 

 flat, or plano-convex ; the pale-yellowish- or reddish-flesh-col- 

 oured disk scarcely at length surpassed by the paler, obsoletely 

 radiate-striate margin. Spores fusiform-ellipsoid; bilocular; 



~ mic. Tuck. Gen. p. 136. Lecidea, Borr. in Hook. Brit. 



Fl. 2, p. 185. Nyl. Scand. p. 192; & in Prodr. N. G. p. 53. 



On bark, New England, Tucker-man I. c. 1872. New York, 

 Peck. Illinois, Hall. Florida, Austin. Alabama, Beaumont. 



Varies no little in the size and coloration of the apothecia, 



as sufficiently shewn in the Cuba lichen (Wright Lich. Cub. n. 

 176, 177) and the New Granada one (Lindig n. 2581, 2596, 2627). 



G. Friesii, Koerb. (G. denudala, Th. Fr.) is not unlike, and 



has been referred here, but differs in its larger, 4-locular spores. 



The green cells differ finally more or less, in the present stock, 



from the ordinary gonidia, in being connected together in short 

 strings ; an observation first made by Bornet, and now taken 

 advantage of by Dr. Miiller to separate his genus Biatorinopsis 

 (Mull. Lich. Beitr. n. 12, in Flora, 1881, n. 15) which he consid- 

 ers referable, together with Ccenogonium (Flora, 1881, p. 236) 

 to the in every other respect widely discrepant Graphidacei. 

 But the disposition of the gonidia in question appears not to be 

 confined to this group of Gyalectce j nor is it perhaps time, in 

 the present state of knowledge of the goniinous system, to 

 appreciate the value of the character. 



2. G. Pineti (Schrad.) Tuckerm. ; thallus thin, membrana- 

 <jeous ; from green passing into lead-coloured, and pale-ash-col- 

 oured ; apothecia minute, sessile, urceolate ; yellowish-flesh-col- 

 oured ; the rounded margin almost concolorous, scarcely striate. 

 Spores fusiform-ellipsoid ; bilocular ; ^ mic. Tuckerm. I c. 



